Malicious PDF — malware analysis report

Static analysis result for SHA-256 39807a2e16e1f827…

MALICIOUS

PDF

87.2 KB Created: 2021-03-24 22:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3250d310d989c574098cf5634c44d064 SHA-1: 59a5de1511fe4384306c1358f8a311fca3b9ebc5 SHA-256: 39807a2e16e1f8272311fe3041f3a34b97ca7aefcd4b6390a83cd53f53b2902d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/wix?keyword=insinkerator+instant+hot+water+dispenser+installation+instructions PDF link annotation
    • http://runmasten.online/barusunuuvdll.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/paturufepupomugi.pdfIn PDF document text
    • https://vedewoxid.weebly.com/uploads/1/3/0/7/130738666/juxenapavugudif_punenisejebo_wipajir_zemelogi.pdfIn PDF document text
    • http://csxmoney.info/trabajos_de_escritura_para_segundo_gradojrmiu.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/fatevekikunux.pdfIn PDF document text
    • https://suwodofiwimi.weebly.com/uploads/1/3/4/4/134495338/kemimekewa.pdfIn PDF document text
    • http://iminn.ru/43026129658gs80y.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/df7b4925fafa65.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/69963434499.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/muvewutunugabus.pdfIn PDF document text
    • http://lakcherie.ru/kurobemit4z40.pdfIn PDF document text
    • http://normal-id.com/88316752849eq1x8.pdfIn PDF document text
    • http://netekepipavosis.sportsontheweb.net/holland_code_careers_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0a9f4bb6-dede-4ff3-8fef-471fc481efdb/94692589307.pdfIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_ce74cf0fdf9940a5a7efcc8a3f6fe14a.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_351ff0ebae7d46dd8acfb4e9ed7115e0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/35bb4d50-f71f-4bab-bdf2-1e3e821d5ded/what_type_of_charging_cable_does_a_kindle_fire_use.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_aa02fd4d774b4832b39b26c7f2579413.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2287c7-2f05-4d07-9d4e-45c5e6d7d9b7/which_statements_accurately_explain_why_the_renaissance_began_in_the_italian_city-states.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ef7e36-4339-40b0-ae9a-d8a08c9dab63/74586895416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fb9c09c-6b5a-409a-8a0b-a25f1238f4d9/nanupaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c74cccee-797a-4ceb-99e8-d86e1586fb9e/how_to_tell_if_a_molecule_has_a_zero_dipole_moment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/695de2cb-0b68-4f37-9ad7-95a011e540f1/wogivemifaxuwobon.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_d20a119a0d814c51bafcf646eacdef57.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off000106d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D5 5136 bytes
SHA-256: 19c04cb129ac7b2b60bd866fbc051314b7bcef2aa3c7d03924fc4eba6619db89
font_02_sfnt_off0001184e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184E 12588 bytes
SHA-256: cce0cb2d37aa431d622538e1b5bac57ed9d768dd0af7b9cb8277adab27b88f9d
font_03_sfnt_off0001400e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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